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https://issues.apache.org/jira/browse/NIFI-5625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16625262#comment-16625262
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ASF GitHub Bot commented on NIFI-5625:
--------------------------------------

Github user alopresto commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/3020#discussion_r219712848
  
    --- Diff: 
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/GetHTTP.java
 ---
    @@ -438,8 +446,8 @@ public void onTrigger(final ProcessContext context, 
final ProcessSessionFactory
                     
clientBuilder.setSslcontext(sslContextService.createSSLContext(ClientAuth.REQUIRED));
                 }
     
    -            final String username = 
context.getProperty(USERNAME).getValue();
    -            final String password = 
context.getProperty(PASSWORD).getValue();
    +            final String username = 
context.getProperty(USERNAME).evaluateAttributeExpressions().getValue();
    +            final String password = 
context.getProperty(PASSWORD).evaluateAttributeExpressions().getValue();
    --- End diff --
    
    See comment above about `password` supporting EL. 


> Support variables  for the properties of HTTP processors
> --------------------------------------------------------
>
>                 Key: NIFI-5625
>                 URL: https://issues.apache.org/jira/browse/NIFI-5625
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Extensions, Variable Registry
>    Affects Versions: 1.7.1
>            Reporter: Kemix Koo
>            Priority: Minor
>
> When set some group (global) variables, some properties of HTTP processors 
> don't support the expressions. for example, USER and PASS, if don't set the 
> global variables, must change for each processors one by one. it's so 
> troublesomely. 



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